Make and share this Asparagus Casserole recipe from Food.com.
- Butter a casserole dish. Put a layer of asparagus on bottom then add soup.
- Next add mushrooms and half the cheese. Add second layer of asparagus and end with a layer of cheese.
- Bake at 350 degrees for 30 minutes or until bubbly. Sprinkle onion rings on top and return to oven for 5 minutes more.
- Serve hot.